Chemistry · Science General

States of Matter

2,382 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice various types of barometer fluids physics

If we use water, instead of mercury, as a barometric liquid,

  1. the glass tube needs to be much longer

  2. the glass tube needs to be of same length

  3. the glass tube needs to be much shorter

  4. the glass tube needs to be narrower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury is the heaviest liquid. Therefore, it rises only to a height of $76cm$ to balance the atmospheric pressure. Water, being $13.6$ times lighter than mercury, will rise to a $13.6$ times larger height. So, the glass tube needs to be much longer.

Multiple choice various types of barometer fluids physics

 ______ is used as barometric liquid as it does not vaporise under vacuum condition.

  1. water

  2. air

  3. Mercury

  4. petrol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

True. Mercury is used as barometric liquid because it does not vaporise under vacuum condition.

Multiple choice various types of barometer fluids physics
Mercury is the densest liquid known. What is the advantage of this property?

  1. It can record the true pressure.

  2. It can be easily seen while taking observation.

  3. It does not affect the barometric height.

  4. Short column of it can counter balance the atmospheric pressure.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by $h\rho g$.

Due to high value of $\rho$ the same pressure can be measured for smaller value of $h$.

Multiple choice various types of barometer fluids physics
Which of the following is not a property of mercury?

  1. It is the densest liquid known.

  2. It can be easily obtained in pure form.

  3. By using it the sides of the tube does not get wet.

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All the given properties of mercury shown are true.

Due to highest density, the same pressure can be measured using relatively shorter column of mercury.
Mercury can easily be obtained in pure form. Hence one can record the true atmospheric pressure as the pressure is directly proportional to the density of the liquid.

Multiple choice various types of barometer fluids physics

Vapour pressure of mercury is

  1. highest among all liquids

  2. negligible

  3. infinity

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The vapor pressure of mercury is negligible. Thus the barometric height of a simple barometer or a mercury barometer is not affected.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which property of water make it easy to contaminate and difficult to purify?

  1. Water is a universal solvent

  2. Tendency to dissolve a large number of substances

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The property of water make it easy to contaminate and difficult to purify is its tendency to dissolve a large number of substances. The ocean/sea water is not fit for drinking and washing because it contains high concentration of the dissolved salts.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which one of the following is not a physical property of water?

  1. Water has low specific heat capacity

  2. It expands on cooling

  3. It is odorless and tasteless
  4. The boiling point of water is $100^\circ C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water has high specific heat capacity. The other options are physical properties of water.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which one of the following property is high in the case of water?

  1. Surface tension

  2. Specific heat

  3. Heat of vaporization and heat of fusion

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Physical properties of water
1.Boiling Point and Freezing Point.
2.Surface Tension, Heat of 3.Vaporization, and Vapor Pressure.
4.Viscosity and Cohesion.
5.Solid State.
6.Liquid State.
7.Gas State.
8.High specific heat capacity.
Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

When we heat water, we can find bubbles coming from it. This shows that:

  1. water contains air

  2. air contains water

  3. hot water becomes bubbles

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When we heat water, we can find bubbles coming from it. This is because the solubility of gases decreases as the temperature increases and that is why the dissolved air bubbles go out from the water. Then as the boiling point of the water is reached ($100^{\circ}C$), water vapour starts to form inside the liquid in the form of bubbles.  

Hence, option (A) is correct.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Pure water is:

  1. colourless and opaque

  2. colourless and transparent

  3. coloured and transparent

  4. colourless, odourless and transparent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pure water, also known as purified water, is water from a source that has removed all impurities. Distilled water is the most common form of pure water. The water can be purified by carbon filtration, microporous filtration and ultraviolet oxidation. Some places use a combination of purification processes. Pure water is colorless, odorless and transparent.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Water exists in which of the following state?

  1. solid

  2. liquid

  3. gas

  4. all of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water exists in solid state (ice), liquid state (water) and gaseous state (steam or water vapours).
Water is the only substance that exists on earth in all the three physical states: solid, liquid and gas. Earth has rivers, lakes and oceans in liquid form. 

Polar regions are covered with solid water called ice. Water absorb solar energy and evaporate and escape as water vapour.